21987420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4027}}^1$

素因数の和:4059

約数の個数: 96

約数和(自身を含む): 75790848

約数和(自身を除く): 53803428

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 4027, 5460, 8054, 12081, 16108, 20135, 24162, 28189, 40270, 48324, 52351, 56378, 60405, 80540, 84567, 104702, 112756, 120810, 140945, 157053, 169134, 209404, 241620, 261755, 281890, 314106, 338268, 366457, 422835, 523510, 563780, 628212, 732914, 785265, 845670, 1047020, 1099371, 1465828, 1570530, 1691340, 1832285, 2198742, 3141060, 3664570, 4397484, 5496855, 7329140, 10993710, 21987420]

約数ペア:

[(1, 21987420), (2, 10993710), (3, 7329140), (4, 5496855), (5, 4397484), (6, 3664570), (7, 3141060), (10, 2198742), (12, 1832285), (13, 1691340), (14, 1570530), (15, 1465828), (20, 1099371), (21, 1047020), (26, 845670), (28, 785265), (30, 732914), (35, 628212), (39, 563780), (42, 523510), (52, 422835), (60, 366457), (65, 338268), (70, 314106), (78, 281890), (84, 261755), (91, 241620), (105, 209404), (130, 169134), (140, 157053), (156, 140945), (182, 120810), (195, 112756), (210, 104702), (260, 84567), (273, 80540), (364, 60405), (390, 56378), (420, 52351), (455, 48324), (546, 40270), (780, 28189), (910, 24162), (1092, 20135), (1365, 16108), (1820, 12081), (2730, 8054), (4027, 5460)]